The mean of seven numbers is 21. five of the numbers are 18, 23, 21, 17, and 19. one of the remaining numbers is 3/4 of the other remaining number. find the two unknown numbers.

Which of these triangle pairs can be mapped to each other using two reflections?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function.a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.